#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright (c) 2017 Baidu, Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# @Author: zhangyuncong
# @Date:   2015-06-30 21:32:57
# @Last Modified by:   zhangyuncong
# @Last Modified time: 2015-07-22 21:59:18

from bigflow import serde

def is_empty(pcollection):
    return pcollection.take(1).count().map(lambda n: n == 0, serde = serde.of(bool))
